offsets.cpp

#include <Windows.h>
#include <fstream>
#include "json.hpp"
#include "offsets.hpp"
#include <sstream>
#include <iostream>
#include <sstream>

template <typename T>
void readValue(const nlohmann::json& src, T& dest)
{
    if (!src.is_null())
    {
        if (src.is_string())
        {
            std::string value_str = src.get<std::string>();
            if (value_str.substr(0, 2) == "0x") // hex prefix
            {
                dest = static_cast<T>(std::stoul(value_str.substr(2), nullptr, 16));
            }
            else
            {
                dest = static_cast<T>(std::stoul(value_str, nullptr, 10));
            }
        }
        else
        {
            dest = src.get<T>();
        }
    }
}

template <>
void readValue<unsigned long long>(const nlohmann::json& src, unsigned long long& dest)
{
    if (!src.is_null())
    {
        if (src.is_string())
        {
            std::string value_str = src.get<std::string>();
            if (value_str.substr(0, 2) == "0x") // hex prefix
            {
                dest = std::stoull(value_str.substr(2), nullptr, 16);
            }
            else
            {
                dest = std::stoull(value_str, nullptr, 10);
            }
        }
        else
        {
            dest = src.get<unsigned long long>();
        }
    }
}

void offsets::initialize()
{
    std::ifstream input_file{ "offsets.json" };
    if (!input_file.good())
        throw std::invalid_argument("Invalid offsets.json file");
    nlohmann::json json;
    input_file >> json;

    readValue(json["offsets"]["VM_XOR_BASE"], offsets::VM_XOR_BASE);
    readValue(json["offsets"]["VM_PTR"], offsets::VM_PTR);
    readValue(json["offsets"]["VM_XOR_KEY"], offsets::VM_XOR_KEY);
}